bolthoff



(No Model.)

W. H. BOLTHOFF.

PERMUTATION PADLOOK. No. 488,516. Patented Dec. 20, 1892.

I Snow/ PM a w-W Nrrnn STATES PATENT OFFICE.

IVILLIAM II. BOLTHOFF, OF DENVER, COLORADO, ASSIGN OR TO THE MILNERMANUFACTURING COMPANY.

PERM UTATION-PADLOCK.

SPECIFICATION forming part of Letters Patent No. 488,516, dated December20, 1892 Application filed J' 11116 18, 1892.

To all whom it may concern:

Be it known that I, WILLIAM H. BOLTHOFF, a citizen of the United States,residing at Denver, in the county of Arapahoe and State of Colorado,have invented certain new and useful Improvements inCombination-Padlocks; and I do hereby declare the following to be afull, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

My invention relates generally to looks and especially to that classknown as combination padlocks. v The object of my invention is toprovide a strong and durable lock and also one which will be watertight, so that the tumblers and other mechanism will be protected andpreserved.

The nature of the invention consists in certain combinations andconstructions all as will be fully described in the specification andpointed out in the claim, reference being had to theaccompanyingdrawings wherein:

Figure 1 is a front elevation showing the lock open. Fig. 2 is asideelevation With the shackle removed. Fig. 3 is a side elevation of theshackle closed. Fig. 4 is a top plan of Fig. 2. Fig. 5 is alongitudinalsection of arm 1).

Referring to the drawings,A represents the body or barrel of the lockwhich may be made any desired size or shape.

B represents the shackle and O the knob which controls the tumblers. Theshackle B fits snugly within the passage a in the top of the barrel andis made of two parts or arms b and b respectively, said arms beingpivoted together at 0. Arm h is made integral with its leg 1) and isprovided with a series of notches b that correspond in number to thetumblers employed. This leg 19 is recessed at a and also has a hole aextending upward as shown. Secured to barrel A and fitting within thishole a is a post C having a hook shaped head 0 adapted to engage with apin Serial No. 437,114. (No model.)

12 extending across the hole a near itslower end, and thus keep theshackle from being drawn out of the barrel when the lock is opened. Thearm I) has a projection 17 on its lower end said projection havingnotches to correspond to those in leg 5 Projection b fits in the recessa and is flush with the recess when the shackle is closed. The arms I)and h are provided on their upper ends with a recess and teatrespectively, lettered 5 5 b and b which fit the latter within theformer when the shackle is closed.

D is the dial plate which is provided with the usual characters. 0 isthe guide post which is secured to the knob C and extends up through thehole d in the leg I) and serves to guide the tumblers.

The operation of the device is as follows: The lock being closed thecombination is operated in the usual manner, when all the tumblers aredisengaged from the notches b the shackle is drawn .up, or the barreldown as the case may be, the arm b going up vertically until the hook con post C engages the pin crossing the hole in said arm. At this pointthe arm 1) drops taking the position shown in Fig. 1, the projectionentering recess 01. in the leg 11 What I claim as new is In a padlockthe barrel A having the passage a a post within said passage, theshackle formed of two pivoted arms I) and 1), arm I) having theprojection 19 and arm I) having the recess a and the hole a said recessbeing adapted to receive projection 12 when the shackle is opened and apost 0 secured to the barrel and adapted to extend within hole a andengage the pin b substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

WVILLIAM I-I. BOLTI-IOFF.

Witnesses:

THORNTON WOODBURY, J OSEPH MILNER.

